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From within a SAS DMS session running under ISPF, the HOSTEDIT command
can be entered, which will bring up an ISPF/PDF edit session.  From
within the ISPF/PDF edit session you can enter SAS program statements
and can also take advantage of various ISPF features, like Split screen.

In some rare instances when entering the HOSTEDIT command from the DMS
session, the ISPF/PDF editor does not get presented, and there are no
messages to indicate why.

To see why the HOSTEDIT failed, you can go to the ISPF Dialog Test
panel.  From here, enable VARIABLE and FUNCTION trace ALL.  Then invoke
SAS from within Dialog test.  When SAS DMS session is presented, enter
the HOSTEDIT command.  Then BYE out of the SAS DMS session.  Look in the
ISPF log for what caused it to not work.  If there is an error like:

***** Dialog Error ***** - Application(ISR); Function Command (SAS);
Service(EDIF)
 Required parm missing - Not all required parameters were found for the
EDIF service.

then this is probably due to what is documented in IBM APAR OW15489.
This APAR states that if the address for the READ/WRITE/COMMAND routines
has the high order byte of x'40' (EBCDIC BLANK Character), then it is
considered as missing even though this is a valid storage address.

A Technical Support hot fix for Release 8.2 (TS2M0) for this issue is
available at:

http://www.sas.com/techsup/download/hotfix/82_sbcs_prod_list.html#009957

Operating System and Release Information

A fix for Release 8.2 (TS2M0) for this issue is available at: